3. Preparation
3.4. Calibrating the transmitter
Revision 3 OneWireless XYR 6000 ISA100.11a Compliant Pressure Transmitter User's Manual 13
March 2012
Upper and Lower Calibration:
The XYR6000 pressure transmitters provide calibration for upper and lower calibration points as well as
the option for calibration of zero. The zero calibration is independent of the upper and lower calibration
and is applied as a bias whereas upper and lower calibration adjusts the gain and offset of the
characterization. Zero calibration is available from the local interface at the transmitter and is done with
the device mounted in its operating orientation and applied “zero” offset head pressure.
Upper and lower calibration are only available when connected to the network where access to the upper
and lower calibration points as well as access to the calibration command is available. Upper and lower
calibration requires the values for the upper and lower calibration points to be entered and the status of the
calibration operation to be verified.
Definitions:
For compound characterized meter bodies the following definition is used:
Positive applied pressure value: A positive applied pressure is an applied pressure where the pressure at the
high side of the meter body is greater than the applied pressure at the low side of the meter body thus
asserting a “positive” relative pressure between the high and low side of the meter body.
Negative applied pressure value: A negative applied pressure is an applied pressure where the pressure at
the high side of the meter body is lower than the applied pressure at the low side of the meter body thus
asserting a “negative” relative pressure between the high and low sides of the meter body.
One side calibration: Often only a positive calibration pressure source is available and compound
calibration is done by applying regulated pressure relative to ambient air to only one side of the meter body
with the other side of the meter body vented to ambient air. In this way a positive calibration pressure
applied to the low side of the meter body can be used to apply “negative” relative pressure value during
calibration of the lower calibration point. Both the upper and lower calibration points can be either positive
or negative values as long as the upper calibration point is greater than the lower calibration point.
Compound Calibration Procedure:
Select the upper and lower calibration points where the transmitter is to be calibrated:
1. Select a the Cal Clear command to remove any zero bias from the transmitter and return the
calibration to a gain of 1 and calibration offset zero in respect to the factory characterization. The
calibration status should return SUCCESS and the Calibration Source will be set to NONE. This
operation will set the device to a known good state. If the calibration status does not return
SUCCESS stop and call Honeywell customer support for further assistance. Cal Clear will clear
any previous user calibration including and zero bias established using a CAL ZERO command.
Factory calibration is preserved but it is not applied.
Note: Make sure the transmitter is in the OOS (Out of Service) state prior to beginning calibration.
2. Select the upper and lower calibration points where the transmitter is to be calibrated. The upper
and lower calibration points can be either positive or negative values as long as the upper
calibration point is greater than the lower calibration point.
3. Set the lower calibration point to the pressure value to be applied for lower calibration. This
calibration point can be either a positive or negative value as long as it is less than the upper
calibration point.
4. Set the upper calibration point to the pressure value to be applied for upper calibration. This
calibration point can be either a positive or negative value as long as it is greater than the lower
calibration point.
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